Attachment for lifting jacks



P. E. HAWKINSON.

ATTACHMENT FOR LIFTING JACKS.

APPLICATION FILED AUG- IB. I921.

Patented Nov. 28, 1922.

Patented Nov. 25, V =J if" 1.2iI if n ingress rarest caries.

PA-UL n riawirrnson, or MINNEAPOLIS, MINNESOTA.

ArrAcHMEnT FOR ,LIVFTINGV JACKS,

Application filed Angust 18, 192 ser ainofieaeoa it appertains to makeandusethe same.

My present invention has for its object-to provide an, extremely simple, light and highly efiicient carrying and positioning at tachment for lifting jacks, intended for general use but especially adaptedfor-use in jacking up the wheels of automobiles and trucks at tire and itire-repairing stations. and garages. 1 T

Tothe above end,pgenerally stated, the

invention consists-of thefnovel devices and as disclosed in Figs. 1 t0 4, inclusive, the at scribed and defined in the claims; 2 [In the accompanying drawings, which 'illustrate the invention, like characters indicate like parts throughout the'sev'eral views.

Referring to the drawings: Fig. 1 is a side elevation of a lifting jack having the improved attachment applied thereto;

Fig; 2' is a in' Fig. 1; a Fig. 3 is a detail viewwith some parts sectioned onthefline 3+3 of Fig. 2, on anenlarged scalej i V I F 4- is adetail' view,insection taken on the line t -dof Fig. 2 on an enlarged scale F is view corresponding to fFigfl and illustrating a modified form of the atta'clnnent; and

Fig. 6 is a detail View with some parts sectioned on the line 6+6 of F ig.,' 5,' onan enlarged scal'e.

For the purpose ofillus'trating the invencombinations of e devices hereinafter de plan view of the parts shown tion, there is showninthe drawings astand ard 'liftin'g, jack 7 having an operating shaft 8, tothe projecting end of'which is attached, by a universal joint '9, a two-part folding operating rod 10,-the sections'of which are connected'by a hinge "joint 1].. To" the outer end-of'the operating rod'lO is ap'Plied-ahand crank 12"having a hinge joint 13, which permits -'sa?i'd hand crank to be foldedonto-the operating rod 10. a p e v.

Referring now in detail "to the invent-ion taclnnent includes a skeleton frame made up of ,apair'of laterally spaced side rods 14' connected by front and rearq U bolts 15. These I side rods 1% and U -bolt s 15 are adapted to embrace the standard of the lifting jack 7, as best shownjinpFig. 2, and

which liftingj'ack' is jdetac'hablysecured to the attachment by frictionally clamping the siderods 14 thereon by U-bol ts 15. I

The frame side rods 14 are bent'to form pairs of front'and rear spring coils 1'6 and '17, respectively, and which side rods,a't the front spring coils 16, are "bent'downwardly andrearwardly {to afford ane-r arms 18 having rigidly secured thereto an axle 19 on which is 'journaled a pai'rof frame-supporting wheels 20.- At'the rear pair of spring coils lfl'the frame side rods 14 are extended rearwardlyan upwardly to alford extensions 21' and then bei'it'first downward, then upward and forward to forward and then afford apair of rear runners 22. "By reference to Fig.32, it will I 'runners 22 divergelaterally and thereby give stability to the side rod-extensions 2l, at'their rear ends, are connected by a pair ofbejaring plates23 in which the operatingrod1O is journaled. These. bearing plates-23. are connected by nut-equipped bolts 24, whiclntogether with the curved outerends ofsaid plates, securely thatlthe attachment maybe very easily and quickly applied to the standard of a lifting j ack or v. removed therefrom. By the use of the attachment, a lifting jack may be wheeled to any desired POSltlOIl by lifti'ng the rear runners 22 above the fioor or ground. The spring coils l6 and 17 are strong enough to support the lifting jack with the bottom of its base substantially in line with the under surfaces'ofth'e wheels 20 and runners 22, as shown in Fig. 1. By mabe noted that these attachment and support the same in an upright position. The frame ,nirmlating t thereof, a lifting pack may be very easily and quicklv positioned under an automobile me attachment from the rear end or truck with little effort on the part of the '(301lS 1.6 and 17 and permit'the jack to rest on the floor or ground ,whenoperated to engage an axle or other object to be lifted without straining any of the parts of the attachment.

' The above described attachment has, in

actual usage, proven highly efficient for the purpose had in view and is very light, strong and durable. What, lv clann 1s:

1. An attachment for lifting jacks com prising a frame" having means for attaching a lifting jack thereto,and a'lsupporting wheel forthe frame. I

,2. An atta'chment for lifting jacks comprising a yielding frame having means for attaching a lifting. jack thereto,and a supporting wheel for the frame' 3. An attachmentfor lifting jacks comprising a frame having means for attaching a lifting jack thereto, said frame havmg an arm, and a frame-supporting wheel journaled on the arm.

4. An attachment for lifting. jacks comprising a frame having means for attaching a lifting jack thereto, said frame having an arm yieldingly connected thereto, and a frame-supporting wheel journaled on the arm.

5. An attachment for lifting jacks comprising a frame having means for attaching a. lifting ack thereto, said frame having front and rear supporting elements, one of which is a wheel.

I 6. An attachment for lifting jacks comprising a frame having means for attaching a lifting jack thereto, said frame having front and rear supporting elements, one of which is a wheel, said elements being yieldingly connected to the frame.

7. An attachment for lifting jacks comprising a framehavingmeans for attaching a lifting jack thereto, a front wheel journaled on the frame, and a rear runner on the frame. I i

c 8.,An attachment for lifting jacks comprising a frame having means for attaching a lifting jack thereto, a pair of front wheels journaled on the frame, and a pair of rear runners secured to the frame.

Q. An attachment for lifting jacks comprising a skeleton frame made up of a pair of side rods and means for connecting the same and attaching a lifting jack thereto, the front end portions of said rods being downwardly extended to afford. a pair of arms, and a pair of frame-smaporting wheels journaled on' said arms.

' 10. An attachment for lifting jacks comprising a skeleton frame made up of a pair of side rods and front and rear U-bolts con.- necting said rods and frictionally clamping the same onto opposite sides of a lifting jack, the front end portions of said rods being downwardly extended to afford a pair of arms, and a pair of frame-supporting wheels journaled on said arms.

11. An attachment for lifting jacks com prising a skeleton frame made up of a pair of side rods and front and rear U-bolts connecting said rods and frictionally clamping the same onto opposite sides of a lifting jack, said rods being bent to form spring coilsand thenextended downward to afford a pair of arms, an axle secured to said arms, and a pair of wheels. journaled on the axle.

12. An attachment for lifting jacks comprising a skeleton framemade up of a pair of side rods and front and rear U-bolts connecting said rods and frictionally clamping the same onto. opposite sides of a lifting jack, said rods being bent to afford front and rear spring coils and at the former of said spring coils saidrods are downwardly extended to afford a pair of arms,.an axle secured to said arms, a pair of wheels journaled on the axle, said rods at the rear spring coils having means for attaching the operating connection of a lifting jack thereto.

13. An attachment for lifting jacks comprising a skeleton frame made up'of a pair of side rods and front and rear U bolts connecting said rods andfrictionally clamping the sameonto opposite sides of a lifting jack, said rods being bent to afford front and rear spring coils and at the former of said spring coils said rods are downwardly extended toaiford a pair of arms. an axle secured to said arms, a pair of wheels journaled on the axle, said rods at the rear spring coils being extended and bent to form a pair of runners, and means for securing the operative connection of a lifting jack to the frame side rods.

14:. A lifting jack having a projecting' handle and provided with a vertically movable supporting wheel, and yielding means downwardly pressing said wheel with sufiicient force to normally carry the jack above the floor but to yield and permitthe jack to engage the floor when under a load.v

Intestimony whereof I aflix my signature.

PAUL E. HAWKINSON. 

